Chevron exec acknowledges "uncertainties" in Australian LNG project

There are still some "uncertainties" in the construction of Chevron's Gorgon liquefied natural gas venture in Australia after a surging Australian dollar, weather delays and higher labor costs boosted project expenses, said Pat Yarrington, the company's chief financial officer. "Our challenge every day is to mitigate the risks as they arrive," Yarrington said in a conference call with investors.